San Onofre Nuclear Generating Station

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Active reactors ( gross ):

Decommissioned Reactors ( gross ):

The San Onofre nuclear power plant (English San Onofre Nuclear Generating Station, SONGS ) is a now disused American nuclear power plant. It lies on the American Pacific coast of California, at San Onofre State Beach ten miles south of San Clemente to the northwest of San Diego County and is surrounded by the San Onofre State Park. The nuclear power plant consists of three blocks, of which the last two were shut down in June 2013. The first reactor is already degraded, and thus the first and only reactor block in California, which was dismantled. The nuclear power plants Vallecitos, Humboldt Bay and Rancho Seco, which have been substantially off earlier were, so far all is not degraded (as of 2014).

Is operated by the Southern California Edison (SCE ); the nuclear power plant is one of Southern California Edison (SCE ) ( 78.21 % ), San Diego Gas & Electric ( 20%) and the City of Riverside (1.79 %). The power plant is located on a 34 acre property.

The location of the site is designated as one of the most dangerous in the world due to the earthquake hazard. There are more than 7.4 million people in 80 miles radius, especially in the major cities Los Angeles and San Diego. Some active fault lines are located in the vicinity, one of which is the famous San Andreas Fault.

According to the operator information, the power plant was designed for earthquakes up to a magnitude 7.0.

The reactors

The first reactor was a pressurized water reactor of the first generation; it was built by Westinghouse. The net output was 436 MW, 456 MW ​​of gross capacity. Construction began on May 1, 1964, the reactor was first synchronized on 16 July 1967, the power supply and took on 1 January 1968 commercial operation on. On November 30, 1992, he was turned off.

The second reactor, built by Combustion Engineering, is also a pressurized water reactor, but with a net output of 1070 MW and a gross capacity of 1127 MW. Construction began on 1 March 1974 he was first synchronized on 20 September 1982 with the electricity grid and went on August 8, 1983 in commercial operation.

The third reactor is identical to the second. The start of construction was also on 1 March 1974 he was synchronized on 25 September 1983 the power grid and went on April 1, 1984 in commercial operation.

Geological environment

In the sea, ten kilometers from San Onofre, run three geological fault lines that continue to under a kilometer away Cristiano Trench. Three other very active fault lines located in 35, 70 and 90 kilometers away one of them is the famous San Andreas Fault.

Incidents

On February 1, 2012 came from a pipe in an outbuilding radioactive gas from, whereupon the building adjacent to the reactor was shut down.

Final shutdown

The operating company, SCE announced on June 7, 2013, to shut down the plant for economic reasons final. The reactors were due to serious problems ( in both reactors tubes have included more than 1,300 ailing been found) has already been shut down in 2012. The uncertainty of whether and when the extensive damage observed in could be resolved at the power plant had led to the decision. In addition, the rising cost of aging reactors and the great competition from gas-fired plants had a negative effect on the economy. The cost of closure and dismantling of the plant are estimated by the operator to approximately $ 3 billion.

Data of the reactor units

The San Onofre nuclear power plant has three blocks:

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